Guild Wars 2

Hi all,
Been playing since launch and all of a sudden – maybe 2 weeks ago? – I’m starting to experience my mouse jumping erratically but only vertically. Isn’t affecting other games or normal Windows. Switched mice and still happening. Could be my newish laptop – about 2 months old but has been working well for a while.

Windows 8.1
HP Envy
All windows updates applied.

Any help would be appreciated.

Thanks.

Sometimes I get an endless camera spin, have not seen this with other programs.